I use xperia x10 for 3 months now, he was traded quickly with a new battery for a problem that did not load. 3 months ago I am very satisfied, many free applications to download, really very pleasant to use, internet really works very well. Weaknesses in my opinion: the battery which hardly like 7:00 and if frequent use (bring the car charger, really essential for those who call a lot), and actually the touch screen is a bit too sensitive when you surf internet, everything else, really a good product. I will give it a 8/10 being really nasty !!